ID this hitchhiker please, thanks!

[jong11]

<a href="http://www.flickr.com/photos/59787482@N02/5474734971/" title="IMG_2599 by jong2012, on Flickr"><img src="http://farm6.static.flickr.com/5212/5474734971_76332ca98f.jpg" width="500" height="333" alt="IMG_2599" /></a>
<a href="http://www.flickr.com/photos/59787482@N02/5474731279/" title="IMG_2593 by jong2012, on Flickr"><img src="http://farm6.static.flickr.com/5293/5474731279_01d132bfb2.jpg" width="500" height="333" alt="IMG_2593" /></a>
Here are some pics of the hitchhiker on the live rock i purchased the other day. Any ideas?

[kduen]

Don't remember the specific name but it is a little worm that will pick-up tiny pieces of the substrate and make a tube for it's home. Pretty neat little guy and I wish I could remember the name.

[SushiGirl]

Spinoid worm.

[Kryos]

Spinoid Worms, I have alot of them too, Detrivore.. good unless irritating your coral

Edit: aw, someone beat me to it

[jong11]

cool, thanks for the help... i read it could be a chaetopterids or spionids